Tachi in Shirasaya (40th NBTHK Juyo Paper)
Signature : Bicchu koku Manjuso ju Sahyoenojo Tsunetsugu
(Bonji) Enkyo 3 nen 5gatu hi (May 1310)
middle Koto : Jyojyo saki ranking : Oowza moro cutting test ranking.Biccyu province.
The blade was polished by high ranking polisher.
Habaki : Gold foiled single habaki.
Blade length : 77.5 cm or 30.51 inches.
Sori : 3.0 cm or 1.18 inches.
Mekugi : 1
Width at the hamachi : 3.10 cm or 1.22 inches.
Width at the Kissaki : 1.57 cm or 0.61 inches.
Kasane : 0.78 cm or 0.30 inches.
Era : Late Kamakura period. (May 1310)７００ years ago.
Shape : The sword is Shinogi Tsukuri, Iorimune, Ubu style with one mekugiana which is ubu style elegant shape and also healthy sword.
Jitetsu : Ko-Itame Hada and Ko-Mokume Hada mixed with Jinie, Chikei work and very clear Utsuri appear.
Hamon : Suguha based with small Ko-Gunome Midare and and in Ha, there are many shim yo. Sunagashi and kinsuji work.
Boshi is NotareYakizume style and togari and turns back.
Special feature : Bicchu koku Manjuso ju Sahyoenojo Tsunetsugu is quite well known wordsmith in Aoe who lived Manjyuso.
At this area, many sword makers like Nobutsugu, Yoshitsugu are also working.
This sword is Koitame had with komokume had mixed Chirimen style jigane and bright hamon clear.
This sword is healthy with Ubu nakago with one mekugiana very rear and also Shinogi ji is well grained without bo-hi engraved.
It is very lucky, I think this sword belonged to Shrine or temple as dedicated item from some Daimyo and had kept so long time in that place.
Because the blade is ubu nakago with one hole and uramei is left.
The sword is quite rare sword.
40th NBTHK Juyo Paper
Aoi Art estimation paper : whole Oshigata.